Vision Self-test

June 30, 1985|By Charlie Jean

BRITISH SCIENTISTS have invented a device that makes it possible to check your own vision. The machine uses a screen that produces a spectrum of laser- induced dots that appear as separate rays. To a nearsighted viewer the rays appear to move downward. A farsighted viewer sees them moving upward. Those with perfect eyesight notice no movement. A person with astigmatism perceives them to be moving sideways. In all cases the speed of the rays' movement indicates how severe the ailment is. The device, called LaserSpec System, is manufactured by Scientifica-Cook Ltd. of London.